WO2015018474A1 - Luminescent substances - Google Patents
Luminescent substances Download PDFInfo
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- WO2015018474A1 WO2015018474A1 PCT/EP2014/001881 EP2014001881W WO2015018474A1 WO 2015018474 A1 WO2015018474 A1 WO 2015018474A1 EP 2014001881 W EP2014001881 W EP 2014001881W WO 2015018474 A1 WO2015018474 A1 WO 2015018474A1
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- 239000000126 substance Substances 0.000 title claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims abstract description 81
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims description 60
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 31
- 229910052712 strontium Inorganic materials 0.000 claims description 22
- 229910052791 calcium Inorganic materials 0.000 claims description 21
- 238000001354 calcination Methods 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 13
- 229910052788 barium Inorganic materials 0.000 claims description 12
- 150000004767 nitrides Chemical class 0.000 claims description 11
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910052765 Lutetium Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000011575 calcium Substances 0.000 description 62
- 229910052693 Europium Inorganic materials 0.000 description 30
- 239000007858 starting material Substances 0.000 description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 239000007789 gas Substances 0.000 description 20
- 239000004065 semiconductor Substances 0.000 description 20
- 238000000295 emission spectrum Methods 0.000 description 18
- 239000000843 powder Substances 0.000 description 18
- PSBUJOCDKOWAGJ-UHFFFAOYSA-N azanylidyneeuropium Chemical compound [Eu]#N PSBUJOCDKOWAGJ-UHFFFAOYSA-N 0.000 description 16
- 239000004570 mortar (masonry) Substances 0.000 description 16
- 229910052582 BN Inorganic materials 0.000 description 15
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 15
- 238000001228 spectrum Methods 0.000 description 14
- 238000012512 characterization method Methods 0.000 description 12
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 150000001342 alkaline earth metals Chemical class 0.000 description 9
- 230000005855 radiation Effects 0.000 description 9
- 230000003595 spectral effect Effects 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- 229910017639 MgSi Inorganic materials 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 7
- 229910004261 CaF 2 Inorganic materials 0.000 description 6
- 229910004762 CaSiO Inorganic materials 0.000 description 6
- 101100476480 Mus musculus S100a8 gene Proteins 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 6
- 238000004020 luminiscence type Methods 0.000 description 5
- -1 oxy nitrides Chemical class 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- 229910004283 SiO 4 Inorganic materials 0.000 description 4
- 229910003668 SrAl Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 229910052950 sphalerite Inorganic materials 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 description 4
- 229910052688 Gadolinium Inorganic materials 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 3
- 229910052771 Terbium Inorganic materials 0.000 description 3
- 244000172533 Viola sororia Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 2
- 229910002420 LaOCl Inorganic materials 0.000 description 2
- 229910010199 LiAl Inorganic materials 0.000 description 2
- 229910010093 LiAlO Inorganic materials 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000008240 homogeneous mixture Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical group [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000010626 work up procedure Methods 0.000 description 2
- 229910016066 BaSi Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 101150027751 Casr gene Proteins 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910017414 LaAl Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 229910017857 MgGa Inorganic materials 0.000 description 1
- 229910017625 MgSiO Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910008484 TiSi Inorganic materials 0.000 description 1
- 235000005811 Viola adunca Nutrition 0.000 description 1
- 240000009038 Viola odorata Species 0.000 description 1
- 235000013487 Viola odorata Nutrition 0.000 description 1
- 235000002254 Viola papilionacea Nutrition 0.000 description 1
- 229910007709 ZnTe Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- XCNGEWCFFFJZJT-UHFFFAOYSA-N calcium;azanidylidenecalcium Chemical compound [Ca+2].[Ca]=[N-].[Ca]=[N-] XCNGEWCFFFJZJT-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002178 europium compounds Chemical class 0.000 description 1
- 229910001940 europium oxide Inorganic materials 0.000 description 1
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052605 nesosilicate Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000004762 orthosilicates Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/77928—Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
Definitions
- inorganic phosphors have been developed to spectrally adapt emissive screens, X-ray amplifiers and radiation or light sources to optimally meet the requirements of the respective field of application while using as little energy as possible.
- new phosphors are constantly being developed in order to further increase energy efficiency, color rendering and stability.
- These phosphors are used in particular as conversion phosphors for phosphor converted LEDs, in short pc LEDs.
- yellow or green and red emitting phosphors are needed when the primary energy source is a blue emitting semiconductor.
- the luminescent screen must contain either an RGB phosphor mixture or a dichroic mixture of a blue-cyan and a yellow-orange emitting phosphor.
- the second variant gives a higher lumen equivalent, provided broadband emitters are used in all cases.
- Another advantage of a dichromatic phosphor mixture is the lower spectral interaction and the associated higher "package gain.” This is also the reason why dichromatic white LEDs based on a blue-emitting semiconductor and a YAG: Ce phosphor as Luminescent screen with respect to the lumen equivalent and the associated lumen efficiency have very good properties and are widely used.
- the biggest disadvantage of dichromatic (blue-yellow) LEDs is their high color temperature (> 4000 K) and the low color rendering in the red spectral range.
- trichromatic LEDs based on a blue semiconductor and a green and a red-emitting phosphor have significant advantages. For this purpose, the search for improved red and green emitting phosphors continues.
- conversion phosphor materials systems such as alkaline earth orthosilicates, thiogallates, garnets, nitrides, oxy nitrides and ⁇ -SiAION'e, each doped with Ce 3+ or Eu 2+ .
- T. Kurushima et al. J. Electrochem.Soc., 2010, 157 (3), J64-J68 disclose a strontium-yttrium-aluminum-silicooxynitride obtained in a solid state synthesis using ammonium chloride as a flux. The use of this compound as a phosphor in a phosphor converted LED is not disclosed.
- the present invention is a compound of the following formula (1):
- EA is selected from the group consisting of Mg, Ca, Sr, Ba or a mixture of two or more of the elements Mg, Ca, Sr and Ba;
- M is selected from the group consisting of Y, Lu or one
- Sr and M stands for Y
- EA is other than Sr when M is Y.
- EA is a mixture of two or more of the elements Mg, Ca, Sr or Ba and / or M is a mixture of Y and Lu. It is thus preferably a compound of the following formula (2),
- Preferred embodiments of the compounds of the formula (2) are compounds in which simultaneously Ca and Sr, Sr and Ba or Y and Lu are present. Preference is thus given to the compounds of the following formulas (2a) to (2n),
- the ratio of the alkaline earth metals to each other or the metals M to each other is arbitrary and fully adjustable. Depending on this ratio, the emission color of the compounds according to the invention can be adjusted.
- the ratio of Mg: Ca, Mg: Sr, Ca: Sr, Ca: Ba or Sr: Ba is based on the amounts of substance, ie the ratio of a: b, a: c, b: c , b: d or c: d, in the formulas (2a) to (2j) between 50: 1 and 1:50, particularly preferably between 20: 1 and 1:20, very particularly preferably between 10: 1 and 1: 10th
- the ratio of Y: Lu, based on the molar amounts, ie the ratio of e: f, in the formulas (2k) to (2n) between 50: 1 and 1:50, is particularly preferred between 20: 1 and 1:20, most preferably between 10: 1 and 1:10, in particular between 5: 1 and 1: 5.
- the alkaline earth metal EA is Ba or equal to Ca or equal to Mg. It is therefore preferably a compound of the following formula (3), (4) or (5) Formula (3) Ca 1 .yMSi-x Alx N 7 .x O x: y Eu 2+ Formula (4) Ba 1 .yMSi 4-x Alx N 7 .x O x: y Eu 2+ Formula (5) wherein the symbols and indices used are those mentioned above
- Preferred embodiments of the compounds of the formula (3), (4) and (5) are the compounds of the following formulas (3a), (3b), (4a), (4b), (5a) and (5b)
- the metal M is lutetium. It is therefore preferably a compound of the following formula (6),
- Preferred embodiments of the compounds of the formula (6) are the compounds of the following formulas (6a), (6b) and (6c),
- the compounds according to formula (1) to (6) or formula (2a) to (2n) or formula (3a) or (3b) or formula (4a) or (4b) or (5a) or (5b) or formula (6a) to (6c) applies to the index x, that 0.5 ⁇ x 2.0, particularly preferably 1, 1 ⁇ x ⁇ 1, 8, particularly preferably 1, 3 ⁇ x ⁇ 1, 7.
- the compounds according to formula (1) to (6) or formula (2a) to (2n) or formula (3a) or (3b) or formula (4a) or (4b) or (5a ) or (5b) or formula (6a) to (6c) applies to the index y, that 0 ⁇ y ⁇ 0.20, particularly preferably 0.02 ⁇ y ⁇ 0.16.
- the value of y, ie the proportion of Eu can set the emission color of the phosphor over a certain range.
- the compounds according to the invention contain not only Mg as alkaline earth metal, ie H. that they either contain only Ca, Sr and / or Ba as alkaline earth metals, or that, if they contain Mg, they contain this in admixture with Ca and / or Sr, in particular in admixture with Ca. If Mg is present in admixture with Ca and / or Sr, then Ca or Sr is preferably present in this mixture at least 30 at%, more preferably at least 50 at%.
- the compounds according to the invention contain no Mg at all, ie. H. in compounds of the formula (2) and the preferred embodiments, the index a is preferably 0.
- Another object of the present invention is a process for preparing the compounds of the invention, comprising the following steps: a) preparing a mixture of a Mg, Ca, Sr and / or Ba compound, a Y and / or Lu compound, an Si compound, an Al compound and an Eu compound, at least one of which is in the form of a nitride and at least one of these compounds is in the form of an oxide; and b) calcining the mixture under non-oxidizing conditions.
- Suitable Ca, Sr or Ba compounds are, in particular, the corresponding nitrides, oxides and carbonates. Preference is given to the nitrides, ie Calcium nitride (Ca 3 N 2), strontium nitride (Sr3N 2), barium nitride (Ba3N2) and mixtures thereof.
- Suitable Y or Lu compounds are, in particular, the corresponding oxides, ie Y 2 O 3 and Lu 2 O 3 and mixtures thereof, but also the corresponding nitrides YN or LuN and mixtures thereof.
- Silicon compounds are in particular silicon nitride and
- Silica and mixtures thereof Preference is given to silicon nitride (Si 3 N 4 ).
- Suitable aluminum compounds are in particular aluminum nitride and aluminum oxide and mixtures thereof. Preference is given to aluminum nitride (AIN).
- europium compounds are europium oxide (especially Eu 2 O 3 ) and europium nitride (EuN) and mixtures thereof.
- the educts used in step a) of the process according to the invention are preferably used in a ratio to one another such that the atomic number of alkaline earth metal, of lutetium and / or yttrium, of silicon, of aluminum, of europium, of nitrogen and of oxygen to the desired ratio Product of the above
- the starting materials are preferably chosen so that the ratio of nitrogen to oxygen in the starting materials corresponds to the ratio in the product. So whether the starting material is used in the form of the nitride and / or the oxide, also decides on the basis of the desired nitrogen-oxygen ratio in the product.
- the mixture in step a) of the process according to the invention is preferably prepared by processing the starting compounds into a homogeneous mixture, ie they are in powder form used and processed together, for example by a mortar to a homogeneous mixture.
- the calcining step, ie step b) of the process according to the invention is carried out under non-oxidizing conditions.
- Non-oxidizing conditions are understood as meaning any conceivable non-oxidizing atmospheres, in particular largely or completely oxygen-free atmospheres, ie an atmosphere whose maximum oxygen content is ⁇ 100 ppm, in particular ⁇ 10 ppm.
- a non-oxidizing atmosphere can be generated, for example, by the use of inert gas, in particular nitrogen or argon.
- a preferred non-oxidizing atmosphere is a reducing atmosphere.
- the reducing atmosphere is defined as containing a reducing gas. Which gases have a reducing effect is known to the person skilled in the art.
- Suitable reducing gases are hydrogen, carbon monoxide, ammonia or ethylene, more preferably hydrogen, which gases may also be mixed with other non-oxidizing gases.
- the reducing atmosphere is particularly preferably prepared by a mixture of nitrogen and hydrogen, preferably in the ratio H 2 : N 2 of 10:50 to 33:30, in each case based on the volume.
- the calcining step, ie step b) of the process according to the invention is preferably carried out at a temperature in the range from 1200 ° C. to 2000 ° C., more preferably in the range from 1400 ° C. to 1900 ° C. and very particularly preferably in the range from 1500 ° C. to 1700 ° C performed. It can be dispensed with the use of a flux.
- the temperatures given above apply in particular to the preparation of compounds which contain only one alkaline earth metal. When using a mixture of several alkaline earth metals, lower calcination temperatures may also be preferred.
- the period of calcination is preferably 1 to 48 hours, more preferably 5 to 24 hours, and most preferably 8 to 12 hours. Although this is not necessarily required in the process according to the invention, since the compounds can be prepared very well even without the addition of a flux at temperatures of about 1600 ° C., it is still possible to use a flux. With additional use of a flux and lower calcination temperatures may be preferred.
- the calcining is preferably carried out in each case such that the resulting mixtures are introduced, for example, in a vessel made of boron nitride in a high-temperature furnace.
- the high-temperature furnace for example, a tube furnace containing a support plate made of molybdenum foil.
- the phosphor thus obtained is aftertreated, for example by mixing it with an alkaline earth metal nitride and again calcining this mixture.
- the phosphors can be worked up by washing, for example by washing with dilute acid, such as. B. dilute HCl.
- another calcining step is carried out, which is usually carried out at comparable temperatures as the first calcining step.
- This further calcination step is preferably carried out under a reducing atmosphere. This can lead to better crystallinity of the product.
- the compounds of the invention may be coated.
- the stability to air and water can be improved by the coating.
- Suitable for this purpose are all coating methods, as known to the person skilled in the art according to the prior art and used for phosphors.
- Suitable materials for the coating are in particular metal oxides and nitrides, in particular earth metal oxides, such as Al 2 O 3 , and Erdmetallnitride, such as AIN, and Si0 2 , B 2 0 3 or BN.
- the coating can tion, for example, from solution or by fluidized bed process. Further suitable coating methods are known from JP 04-304290, WO 91/10715, WO 99/27033, US 2007/0298250, WO 2009/065480 and WO 2010/075908.
- Another object of the present invention is the use of the compound of the formula (1) or the above-mentioned preferred compounds according to the invention as a phosphor, in particular as a conversion phosphor.
- the term “conversion luminescent material” is understood to mean a material which absorbs radiation in a specific wavelength range of the electromagnetic spectrum, preferably in the blue, violet or UV spectral range, and in another wavelength range of the electromagnetic spectrum, preferably in the red,
- the term “radiation-induced emission efficiency” is to be understood, ie the conversion phosphor absorbs radiation in a certain wavelength range and emits radiation in another wavelength range with a certain efficiency.
- a further subject of the present invention is an emission-converting material comprising the compound of the formula (1) according to the invention or the preferred embodiments.
- the emission converting material may consist of the compound of the invention and in this case would be of the term defined above
- the emission-converting material according to the invention contains, in addition to the compound according to the invention, further conversion phosphors.
- the emission-converting material according to the invention contains a mixture of at least two conversion phosphors, one of which is a compound of the formula (1) or of the preferred embodiments according to the invention.
- the at least two conversion Phosphors are phosphors that emit light of different wavelengths. Since the compound of the formula (1) or the preferred embodiments according to the invention are green or yellow emitting phosphors, these are preferably used in combination with an orange or red emitting phosphor and optionally additionally with a cyan or blue emitting phosphor. It may thus be preferred that the conversion phosphor according to the invention is used in combination with one or more further conversion phosphors in the emission-converting material according to the invention, which then together preferably emit white light.
- blue light is defined as light whose emission maximum lies between 400 and 459 nm, cyan light whose emission maximum is between 460 and 505 nm, green light whose emission maximum lies between 506 and 545 nm , as yellow light such, whose emission maximum lies between 546 and 565 nm, as orange light such, whose
- Emission maximum between 566 and 600 nm and is such as red light whose emission maximum is between 601 and 670 nm.
- BaSrMgSi 2 0 7 Eu 2+ , BaTiP 2 0 7 , (Ba, Ti) 2 P 2 O 7 : Ti, Ba 3 WO 6 : U,
- BaY 2 F 8 Er 3+ , Yb + , Be 2 Si0 4 : Mn 2+ , Bi 4 Ge 3 0 12 , CaAl 2 0 4 : Ce 3+ , CaLa 4 0 7 : Ce 3+ , CaAl 2 O: Eu 2+ , CaAl 2 O 4 : Mn 2+ , CaAl 4 O 7 : Pb 2+ , Mn 2+ , CaAl 2 O 4 : Tb 3+ ,
- Ca3AI 2 Si 3 0i 2 Ce 3+
- Ca3AI 2 Si 3 0i 2 Ce 3+
- Ca 2 B 5 O 9 Br Eu 2+
- CA2B 5 0 9 CI Eu 2+
- Ca 2 B 5 O 9 CI Pb 2+
- CaB 2 O 4 Mn 2+
- Ca 2 B 2 O 5 Mn 2+
- CaB 2 O 4 Pb 2 ⁇ CaB 2 P 2 0 9: Eu 2+, Ca 5 B 2 SiOio: Eu 3+,
- Ca 2 Ba 3 (P0 4 ) 3 Cl Eu 2+ , CaBr 2 : Eu 2+ in Si0 2l
- CaCl 2 Eu 2+ in Si0 2
- CaCl 2 Eu 2+ , Mn 2+ in Si0 2
- CaF 2 Eu 2+
- CaF 2 : U CaGa 2 O 4 : Mn 2+ ,
- CaGa 0 7 Mn 2+
- CaGa 2 S 4 Ce 3+
- CaGa 2 S 4 Eu 2+
- CaGa 2 S Mn 2+
- CaGa 2 S 4 Pb 2 ⁇ CaGe0 3 : Mn 2+ , Cal 2 : Eu + in Si0 2 , Cal 2 : Eu 2+ , Mn + in Si0 2> CaLaB0 4 : Eu J + , CaLaB 3 0 7 : Ce J + , Mrr, Ca 2 La 2 B0 6 .
- Ca 2 P 2 O 7 Ce 3+ , ⁇ -Ca 3 (PO 4 ) 2 : Ce 3+ , ⁇ -Ca 3 (PO 4 ) 2 : Ce 3+ , Ca 5 (PO 4 ) 3 CI: Eu 2 + , Ca 5 (P0 4 ) 3 Cl: Sb 3+ , Ca 5 (PO 4 ) 3 Cl: Sn 2+ ,
- beta-Ca 3 (PO 4) 2 Eu 2+, Mn 2+, Ca 5 (P0 4) 3 F: Mn 2+, Ca s (PO 4) 3 F: Sb 3+, Ca s (P0 4) 3 F: Sn a-Ca 3 (PO 4 ) 2 : Eu 2+ , ⁇ -Ca 3 (PO 4 ) 2 : Eu 2+ , Ca 2 P 2 O 7 : Eu 2+ , Ca 2 P 2 O 7 : Eu 2+, Mn 2 ⁇ CaP 2 0 6: Mn 2+, a-Ca 3 (P0 4) 2: Pb 2+, a-Ca 3 (PO 4) 2: Sn 2+, beta-Ca 3 (P0 4 ) 2 : Sn 2+ , ⁇ -Ca 2 P 2 O 7 : Sn, Mn, ⁇ -Ca 3 (PO 4 ) 2 : Tr, CaS: Bi 3+ , CaS: Bi 3+ , Na, CaS: Ce 3
- CaTi0 3 Eu 3 ⁇ CaTi0 3 : Pr 3+ ( Ca 5 (V0 4 ) 3 Cl, CaW0 4> CaWO 4 : Pb 2+ , CaW0 4 : W, Ca 3 W0 6 : U, CaYAI0 4 : Eu 3+ , CaYBO 4: Bi 3+, CaYB0 4: Eu 3+, CaYB 0 8 O 3 .7. Eu 3+, CaY 2 Zr0 6: Eu 3 ⁇ (Ca, Zn, Mg) 3 (PO 4) 2: Sn, CeF 3 , (Ce.MgJBaAl OiaiCe,
- GdNb0 4 Bi 3+ , Gd 2 0 2 S: Eu 3+ , Gd 2 0 2 Pr 3+ , Gd 2 0 2 S: Pr, Ce, F, Gd 2 O 2 S: Tb 3+ , Gd 2 Si0 5 : Ce 3+ , KAIn 0 17 : TI + , KGa 0 17 : Mn 2+ , K 2 La 2 Ti 3 O 10 : Eu, KMgF 3 : Eu + , KMgF 3 : Mn 2+ , K 2 SiF 6 : Mn + , LaAl 3 B 4 O 12 : Eu 3+ , LaAIB 2 0 6 : Eu 3+ , LaAIO 3 : Eu 3+ , LaAlO 3 : Sm 3+ , LaAsO 4 : Eu 3+ , LaBr 3 : Ce 3+ , LaB0 3 : Eu 3+ , (La, Ce, Tb) PO 4 : Ce: Tb
- LiAIF Mn 2+ , LiAl 5 O 8 : Fe 3+ , LiAlO 2 : Fe 3+ , LiAlO 2 : Mn 2+ , LiAl 5 O 8 : Mn 2+ ,
- Li 2 CaP 2 O 7 Ce 3+ , Mn 2+ , LiCeBa 4 Si 4 O 14 : Mn 2+ , LiCeSrBa 3 Si 4 O 1 : Mn 2+ .
- Mg 2 Ca (SO 4 ) 3 Eu 2+ , Mn 2 , MgCeAl n O 19 : Tb 3+ , Mg 4 (F) GeO 6 : Mn 2+ ,
- SrB 4 0 7 Eu 2+ (F, CI, Br), SrB 4 0 7 : Pb 2+ , SrB 4 0 7 : Pb 2+ , Mn 2+ , SrB 8 0 13 : Sm 2+ , Sr x Ba y CI 2 Al 2 O 4- z ⁇ : Mn 2+ , Ce 3+ , SrBaSiO 4 : Eu 2+ , Sr (CI, Br, I) 2 : Eu 2+ in SiO 2 , SrCl 2 : Eu 2+ in Si0 2 , Sr 5 Cl (PO 4 ) 3: Eu, Sr w F x B 4 O 6.5 : Eu 2+ , Sr w F x B y O z : Eu 2+ , Sm 2+ , SrF 2 : Eu 2+ , SrGa 12 O 9 : Mn 2+ , SrGa 2 S 4 : Ce 3+ , SrGa
- Sr 5 (PO 4 ) 3 F Sb 3+ , Mn 2+ , Sr 5 (PO 4 ) 3 F: Sn 2+ , Sr 2 P 2 O 7 : Sn 2+ , ⁇ -Sr 3 (PO 4 ) 2 : Sn 2+ , ⁇ -Sr 3 (PO 4 ) 2 : Sn 2+ , Mn 2+ (Al), SrS: Ce 3+ , SrS: Eu 2+ , SrS: Mn 2+ , SrS: Cu + , Na , SrS0 4 : Bi, SrS0 4 : Ce 3+ , SrSO 4 : Eu 2+ , SrS0 4 : Eu 2+ , Mn 2+ , Sr 5 Si 4 0 1 oC!
- Th0 2 Eu 3+
- Th0 2 Pr 3+
- Th0 2 Tb 3+
- YAl 3 B 4 0i 2 Bi 3+
- YAl 3 B 4 0 12 Ce 3+
- YAl 3 B 4 O 12 Ce 3+ , Mn
- YAl 3 B 4 Oi 2 Ce 3+ , Tb 3+
- YAl 3 B 4 Oi 2 Eu 3+
- YAl 3 B 4 O 12 Eu 3 ⁇ Cr 3 ⁇ YAI 3 B 4 O 12 : Th + , Ce 3+ , Mn 2+ , YAlO 3 : Ce 3+ , Y 3 Al 5 0 12 : Ce 3+ , Y3AI 5 0 12: Cr 3+, YAlO 3: Eu 3+, Y3AI 5 0 12: Eu 3r, Y4AI 2 0 9: Eu 3+, Y3AI 5 0 12: Mn +, YAI0 3: Sm 3+, YAI0 3: Tb 3+ , Y 3 Al 5 O 2 : Tb 3+ , YAsO 4 : Eu 3+ , YB0 3 : Ce 3+ , YB0 3 : Eu 3+ , YF 3 : Mn 2+ , YF 3 : Mn 2+ , Th + , YF 3 : Tm 3+ , Yb 3+ , (Y
- YOCI Eu 3 ⁇ YOF: Eu 3+ , YOF: Tb 3+ , Y 2 0 3 : Ho 3+ , Y 2 0 2 S: Eu 3 ⁇ Y 2 0 2 S: Pr 3+ , Y 2 0 2 S Tb 3+ , Y 2 O 3 : Tb 3+ , YPO 4 : Ce 3+ , YPO 4 : Ce 3+ , Tb 3+ , YPO 4 : Eu 3+ ,
- YPO 4 Mn 2+ , Th + , YPO 4 : V 5+ , Y (P, V) O 4 : Eu, Y 2 SiO 5 : Ce 3+ , YTaO 4 , YTaO 4 : Nb 5+ , YV0 4: Dy 3+, YV0: Eu 3+, ZnAl 2 O 4: Mn z +, ZnB 2 O 4: Mn +, ZnBa 2 S 3: Mn ⁇ +,
- (Zn, Cd) S Cu, ZnF 2 : Mn 2+ , ZnGa 2 O, ZnGa 2 O 4 : Mn 2+ , ZnGa 2 S: Mn 2+ ,
- Zn 2 GeO 4 Mn 2+ , (Zn, Mg) F 2 : Mn 2+ , ZnMg 2 (P0 4 ) 2 : Mn 2+ , (Zn, Mg) 3 (PO 4 ) 2 : Mn 2+ , ZnO : Al 3+ , Ga 3+ , ZnO: Bi 3+ , ZnO: Ga 3+ , ZnO: Ga, ZnO-CdO: Ga, ZnO: S, ZnO: Se, ZnO: Zn, ZnS: Ag + , Cl " , ZnS: Ag, Cu, Cl, ZnS.Ag.Ni, ZnS: Au, In, ZnS-CdS (25-75), ZnS-CdS (50-50), ZnS-CdS (75-25), ZnS- CdS: Ag, Br, Ni, ZnS-CdS: Ag + , Cl, ZnS-CdS: Cu, Br, Zn
- ZnS Te, Mn, ZnS-ZnTe: Mn 2+ , ZnSe: Cu + , Cl or ZnWO 4 .
- Particularly suitable phosphors which can be combined with the compound according to the invention are the phosphors listed in the table below.
- the emission-converting material according to the invention is used in a light source.
- the light source is an LED, in particular a phosphor-converted LED, in short pc-LED.
- the emission-converting material in addition to the Conversion luminescent material according to the invention comprises at least one further conversion luminescent material, in particular so that the light source emits white light or light with a specific color point (color-on-demand principle).
- Color-on-demand principle means the realization of light of a particular color point with a pc-LED using one or more conversion phosphors.
- Another object of the present invention is thus a light source, the primary light source and the emission-converting
- the emission-converting material in addition to the conversion phosphor according to the invention comprises at least one further conversion luminescent material, so that the light source preferably emits white light or light with a specific color point.
- the light source according to the invention is preferably a pc-LED.
- a pc-LED usually contains a primary light source and an emission converting material.
- the emission-converting material according to the invention can either be dispersed in a resin (for example epoxy or silicone resin) or, with suitable size ratios, directly on the primary light source or, depending on the application, remotely located therefrom (the latter arrangement also includes "Remote Phosphor Technology " with a).
- the primary light source may be a semiconductor chip, a luminescent light source such as ZnO, a so-called transparent conducting oxide, a ZnSe or SiC based device, an organic light emitting layer based device (OLED), or a plasma or discharge source, most preferably semiconductor chip.
- a luminescent light source such as ZnO, a so-called transparent conducting oxide, a ZnSe or SiC based device, an organic light emitting layer based device (OLED), or a plasma or discharge source, most preferably semiconductor chip.
- the primary light source is a semiconductor chip, it is preferably a luminescent indium-aluminum-gallium nitride (InAIGaN), as known in the art.
- InAIGaN luminescent indium-aluminum-gallium nitride
- the primary light source When the primary light source emits blue light, it emits
- Emission converting material prefers green and orange or red light.
- the emission converting material preferably emits cyan and yellow or orange light, or more preferably blue, green and orange or red light.
- the emission-converting material according to the invention can be converted for use in light sources, in particular pc LEDs, into any shapes such as spherical particles, platelets and structured materials and ceramics. These forms are summarized under the term "shaped body". Consequently, the moldings are emission-converting moldings. These are another object of the present invention.
- Yet another object of the invention is a ceramic containing at least one compound of the invention or
- the ceramic can only consist of the compound according to the invention. But it can also be matrix materials and / or more
- Phosphors included. Suitable matrix materials are, for example, SiO 2 , Y 2 O 3 or Al 2 O 3 .
- Another subject of the invention is a lighting unit which contains at least one light source according to the invention.
- Lighting units are mainly used in display devices, in particular liquid crystal display devices (LC display) with a backlight. Therefore, such a display device is the subject of the present invention.
- LCD display liquid crystal display devices
- Coupling between the emission-converting material and the Primary light source also take place by a light-conducting arrangement.
- the primary light source to be installed at a central location and to be optically coupled to the emission-converting material by means of light-conducting devices, such as, for example, photoconductive fibers.
- the illumination requirements adapted lights consisting of one or more different conversion phosphors, which may be arranged to a fluorescent screen, and a light guide, which is coupled to the primary light source realize.
- This makes it possible to place a strong primary light source in a convenient location for the electrical installation and to install without further electrical wiring, only by laying fiber optics at any location, lights of emission-converting materials, which are coupled to the light guide.
- the compounds emit green or yellow light having a broad emission spectrum and a high quantum efficiency. They are therefore particularly suitable for lighting applications.
- the compounds are very synthetically accessible.
- the compounds of the invention comprise a mixture of two or more alkaline earth metals, they can be made energy efficient at a lower calcination temperature.
- in the synthesis of these compounds can be completely dispensed with the use of a flux. This represents a considerable technical advantage, since the high corrosivity of the flux, in particular of fluorine-containing compounds, makes high technical demands on the process.
- FIG. 1 X-ray powder diffractogram of SrLuAl1.5Si2.5N5.5O1 5: 0.5%
- Example 1 (against BaSO 4 as white standard).
- FIG. 3 Excitation spectrum of SrLuAl1.5Si2.5N5.5O1 5: 0.5% Eu 2+
- FIG. 5 X-ray powder diffractogram of SrLuAl1.5Si2.5N5.5O1 5: 16%
- FIG. 6 Emission spectrum of SrLuAl1.5Si2.5N5.5O1 5: 16% Eu 2+
- FIG. 7 X-ray powder diffractogram of BaLuAI 1.5Si 2.5 N 5.5 O 1.5: 0.5%
- FIG. 9 X-ray powder diffractogram of BaLuAI 1.5Si 2 .5 N 5 .5 O 1 5: 16%
- FIG. 10 Emission spectrum of BaLuAli. 5 Si2.5N 5.5 Oi.5: 16% Eu 2+
- FIG. 11 X-ray powder diffractogram of Sro.9Cao.1LuAlL5Si2.5N5.5O1.5: 1% Eu 2+ from example 5.
- FIG. 13 X-ray powder diffractogram of Sro.9Bao.1LuAlL5Si2.5N5.5OL5
- FIG. 15 X-ray powder diffractogram of SrYo.5Luo.5AI1.5Si2.5N5.5O1 5:
- FIG. 17 X-ray powder diffractogram of FIG :
- Figure 19 X-ray powder diffractogram of SrLuo.sYo.sAl sS ⁇ .sNs sOi.s:
- FIG. 21 X-ray powder diffractogram of SrLuo, 75Yo, 25Ali, 5812.5 ⁇ , 501.5:
- FIG. 23 X-ray powder diffractogram of FIG : 10% Eu 2+ from example 11.
- FIG. 24 Emission spectrum of BaLuAh, 5 Si 2 , 5N5.5Oi, 5 :10% Eu 2+
- FIG. 25 X-ray powder diffractogram of SrLuAl 0 , 5Si3.5N 6 , 50o , 5: 10%
- Figure 27 X-ray powder of Bal_uAlo, 5Si3 i5 N6, 5 0o, 5: 10%
- FIG. 29 X-ray powder diffraction pattern of SrYAl 3 SiN 4 O 3 : 10% Eu 2+
- FIG. 30 Emission spectrum of SrYAl 3 SiN 4 O 3 : 10% Eu 2+ from example 14
- FIG. 31 X-ray powder diffractogram of SrYA 16% Eu 2+ from example 15.
- FIG. 32 Emission spectrum of SrYAl 1 , 5Si 2 , 5N5 , 5Oi, 5 : 16% Eu 2+
- FIG. 33 LED spectrum of the LED from Example 17 with the phosphor
- FIG. 34 LED spectrum of the LED from Example 18 with the phosphor
- FIG. 35 LED spectrum of the LED from Example 19 with the phosphor Sro.84YSi2.5AI1.5N5.5O1. 5 : Eu 2+ (16%).
- FIG. 36 LED spectrum of the LED from example 20 with the phosphor
- FIG. 37 LED spectrum of the LED from Example 21 with the phosphor
- FIG. 38 LED spectrum of the LED from Example 22 with the phosphor
- Powder emission spectra are measured by the following general procedure: A phosphor powder bed having a depth of 5 mm, the surface of which is smoothed with a glass slide, is placed in the integration sphere of an Edinburgh Instruments FL 920 fluorescence spectrometer with a xenon lamp as the excitation light source at a wavelength of Irradiated 450 nm and the intensity of the emitted fluorescence radiation in a range of 465 nm to 800 nm in 1 nm steps measured.
- Example 8 SrLuo ⁇ sYo sAli.sSi ⁇ sNs.sOi.s: ⁇ Eu 2+
- X-ray powder diffractograms show that the specified compounds are formed in phase-pure form.
- Example 16 Measurement of the Luminescence Properties of the Phosphors of Examples 1 to 15
- the thermal quenching TQ is the temperature at which the intensity of the luminescence has decreased by half compared to the luminescence intensity extrapolated to 0 K.
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a blue semiconductor LED and cured with heat.
- the blue semiconductor LEDs used in the present example for the LED characterization have an emission wavelength of 450 nm and are operated at 350 mA current.
- the light-technical characterization of the LED is carried out with a spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by determining the wavelength-dependent spectral power density.
- the spectrum thus obtained of the light emitted by the LED is used to calculate the color point coordinates CIE x and y.
- Example 18 Preparation of a pc-LED using a phosphor of the composition : Eu 2+ (16%) 0.95 g of the phosphor with the composition
- BaLuAI1.5Si2.5N5.5O1 5: Eu 2+ (16%) from Example 4 are mixed with 9.05 g of an optically transparent silicone and then in a
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a near-UV semiconductor LED and cured with heat.
- the near-UV semiconductor LEDs used in this example for LED characterization have an emission wavelength of 395 nm and are operated at 350 mA current.
- the light-technical characterization of the LED is carried out with a spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by determining the wavelength-dependent spectral power density.
- the spectrum thus obtained of the light emitted by the LED is used to calculate the color point coordinates CIE x and y.
- Example 19 Production of a pc-LED Using a Phosphor of the Composition Sro.8 YSi2.5AI1.sN5.5O1 5: Eu 2+ (16%)
- Example 15 Sro.84YSi2.5AI1.5N5.5O1.5: Eu 2+ (16%) from Example 15 are weighed, mixed with 8.5 g of an optically transparent silicone and then homogeneously mixed in a planetary centrifugal mixer, so that the phosphor concentration in the total mass 15 wt .-% is.
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a near-UV semiconductor LED and cured with heat.
- the near-UV semiconductor LEDs used in the present example for the LED characterization have an emission wavelength of 395 nm and are operated at 350 mA current.
- the light-technical characterization of the LED is carried out with a spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by determining the wavelength-dependent spectral power density.
- the spectrum thus obtained emitted by the LED Light is used to calculate the color point coordinates CIE x and y.
- Example 20 Preparation of a pc-LED using a phosphor of the composition Sro.oYSiAUOs ⁇ : Eu 2+ (10%)
- Sro.9 SYSiA 3 0 3 N 4: Eu 2+ (10%) from Example 14 are weighed, mixed with 8.5 g of an optically transparent silicone and then homogeneously mixed in a planetary centrifugal mixer, so that the phosphor concentration in the total mass 15 wt. % is.
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a near-UV semiconductor LED and cured with heat.
- the near-UV semiconductor LEDs used in this example for LED characterization have an emission wavelength of 395 nm and are operated at 350 mA current.
- the light-technical characterization of the LED is carried out with a spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by determining the wavelength-dependent spectral power density.
- the spectrum thus obtained of the light emitted by the LED is used to calculate the color point coordinates CIE x and y.
- Sr0.9LuSi3.5AI0.5O0.5N6 5: Eu 2+ (10%) from Example 12 are weighed, mixed with 8.5 g of an optically transparent silicone and then mixed homogeneously in a planetary centrifugal mixer so that the phosphor concentration in the total mass 15 Wt .-% is.
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a near-UV semiconductor LED and cured with heat.
- the near-UV semiconductor LEDs used in the present example for LED characterization have one
- the photometric characterization of the LED is done with a Spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by the determination of the wavelength-dependent spectral power density.
- the spectrum thus obtained of the light emitted by the LED is used to calculate the color point coordinates CIE x and y.
- Ba0.9LuSi3.5AI0.5O0.5N6 5: Eu 2+ (10%) from Example 13 are weighed, mixed with 8.5 g of an optically transparent silicone and then mixed homogeneously in a planetary centrifugal mixer so that the phosphor concentration in the total mass 15 Wt .-% is.
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a near-UV semiconductor LED and cured with heat.
- the near-UV semiconductor LEDs used in the present example for the LED characterization have an emission wavelength of 395 nm and are operated at 350 mA current.
- the light-technical characterization of the LED is carried out with a spectrometer from the company Instrument Systems - spectrometer CAS 140 and an associated integrating sphere ISP 250.
- the LED is characterized by determining the wavelength-dependent spectral power density.
- the spectrum thus obtained of the light emitted by the LED is used to calculate the color point coordinates CIE x and y.
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Abstract
Description
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KR1020167006029A KR20160042021A (en) | 2013-08-08 | 2014-07-09 | Luminescent substances |
EP14739677.4A EP3031302A1 (en) | 2013-08-08 | 2014-07-09 | Luminescent substances |
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CN110872515A (en) * | 2019-11-27 | 2020-03-10 | 五邑大学 | Nitrogen oxide green fluorescent powder, preparation method and light-emitting device with nitrogen oxide green fluorescent powder |
CN110922969B (en) * | 2019-11-27 | 2022-09-06 | 五邑大学 | Nitrogen oxide blue fluorescent powder, preparation method and light-emitting device with nitrogen oxide blue fluorescent powder |
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US9745511B2 (en) | 2017-08-29 |
US20160186056A1 (en) | 2016-06-30 |
KR20160042021A (en) | 2016-04-18 |
EP3031302A1 (en) | 2016-06-15 |
CN105474750A (en) | 2016-04-06 |
TW201512101A (en) | 2015-04-01 |
JP2016535719A (en) | 2016-11-17 |
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